Difference Between Ions and Electrons

Ions vs Electrons

There are many differences between electrons and ions; size, charge, and nature are some of them. Electrons are negatively charged micro particles and ions are either negatively or positively chargedmoleculesoratoms。电子的性质explained using “quantum mechanics.” But properties of ions can be explained using general chemistry. Electron (symbol: β- or ℮-) is a sub-atomic particle, and it does not have sub-particles or sub-structures. But, ions can have even more complex structures with sub-components.

电子是什么?

Electron was first discovered by J.J. Thompson in 1906 while he was working with cathode rays that are called electron beams. He found that electrons arenegatively charged micro particles。He used to call them “corpuscles。” Moreover, he found that the electron is an element of the atom and it is over 1000 times smaller than theHydrogen atom。The size of the electron is approximately 1/1836 of aproton。

According to the Bohr’s theory, electrons orbit around thenucleus。But later, as a result of scientific experiments, it was found that electrons behave more likeelectromagnetic wavesthan orbiting particles.

What is an Ion?

As said before, ions are eithernegatively or positively charged molecules or atoms。Both atoms and molecules can form ions by accepting or removing electrons. Theygain positive charge (K⁺, Ca²⁺, Al³⁺) by removing electronsandgain negative charge (Cl^–, S^2-, AlO₃^–) by accepting electrons。When an ion is formed, the number of electrons is not equal to the number of protons. However, it does not change the number of protons in the atom/molecule. The gain or loss of one or more electrons has a significant effect on the physical and chemical properties of the parental atom/molecule.

What is the difference between Electrons and Ions?

• Electric Charge:

• Electrons are considered as negatively charged elementary particles but can be either positive or negative.

• Ions with a positive charge are called “positive ions” and similarly ions with a negative charge are called “negative ions.” Ions are formed by accepting or donating electron(s).

– Examples of positive ions: Na⁺, Ca²⁺, Al³⁺, Pb⁴⁺, NH₄⁺

— Examples of negative ions: Cl^–, S^2-, AlO₃^–

• Size:

• Electrons are extremely smaller particles compared to the ions.

• The size of ions varies depending on several factors.

• The size of an electron is a fixed value; it is about 1/1836 of a proton.

• Atomic Structure:

• Electrons are not polyatomic or monatomic. Electrons do not combine with each other to form compounds.

• Ions can bepolyatomic or monatomic; monatomic ions contain only one atom whereas polyatomic ions contain more than one atom.

– Monatomic ions: Na⁺, Ca²⁺, Al³⁺, Pb⁴⁺

– Polyatomic ions: ClO₃^–, SO₄^3-

• Particles:

• Electrons are micro particles and possess wave-particle properties (Wave-particle duality).

• Ions are considered as particles only.

• Elements:

• Electrons are considered as elemental particles. In other words, electrons cannot be divided into smaller components or substructures.

•所有离子子组件。例如,polyatomic ions contain various atoms; atoms can be further sub-divided into neutrons, protons, electrons, etc.

• Properties:

• All electrons have the similar wave-particle properties, which can be explained using quantum mechanics.

• Chemical and physical properties of ions vary from ion to ion. In other words, different ions have different chemical and physical properties.

Images Courtesy:

1. Pair productionbyDavidhorman(CC BY-SA 3.0)
2. An electrostatic potential map of the nitrate ion (NO3−)via Wikicommons (Public Domain)